KnowB.M.I tells you what your Body Mass Index(BMI) is.All you need to tell this application is your height and your weight, it tell you if you are underweight, normal, overweight, or obese.For medical purposes as well as personal fitness test, KnowB.M.I proves to be a good and useful tool to test your fitness levels. Requirements: Windows Phone 8.1, Windows Phone 8, Windows Phone 7.5